PCI FDDI Administrator's Guide

Troubleshooting PCI FDDI

Diagnostics

Chapter 3 77

— Ring_Op: the node and ring are operational.

— Detect: ring has been non-operational for more than the default

time of 1 second. The MAC is in a duplicate-address-detect state.

— No_Op_Dup: ring is not operational and another node with the

same MAC address was detected.

— Op_Dup: ring is operational and another node with the same

MAC address was detected.

— Directed: this MAC is sending beacon frames to notify the ring

of a stuck condition.

— Trace: this MAC initiates a trace function to provide a recovery

from a stuck beacon.

NOTE Refer to the RMT ANSI FDDI/SM speciﬁcations description for more

detailed information.

— CF State: Conﬁguration State of the station indicates

whether the state is: Isolated, Local_A, Local_B, Local_S,

Wrap_A, Wrap_B, Wrap_AB, Wrap_S, C_Wrap_A,

C_Wrap_B, C_Wrap_S, Thru or Unknown.

• The normal state for a Dual Attach Station is Thru.

• The Wrap_A, Wrap_B, Wrap_AB, C_Wrap_A, C_Wrap_B

states indicate that there is only a single data ring. Data

for the ring is transmitted and received through the same

port (A or B).

• For a Dual Attach Station, a wrap state usually indicates

that the dual ring is wrapped (a failure was detected and

a surrounding node is “wrapping” and using either the A

or B port to send and receive data) or this is a transitory

start-up state indicating that the A or B port is ready to

be incorporated into the ring.

• For a Single Attach Station (the A or B port is attached to

the M port of an FDDI device such as a concentrator),

C_Wrap_A or C_Wrap_B is the normal operating state,

depending on the port used.